Stibiobetafite Mineral Data

Stibiobetafite Mineral Data +

General Stibiobetafite Information

Chemical Formula:

(Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7

Composition:

Molecular Weight = 433.88 gm

Calcium 10.16 % Ca 14.22 % CaO

Tantalum 16.68 % Ta 20.37 % Ta₂O₅

Titanium 9.93 % Ti 16.57 % TiO₂

Niobium 14.99 % Nb 21.44 % Nb₂O₅

Tin 2.74 % Sn 3.47 % SnO₂

Antimony 19.64 % Sb 23.51 % Sb₂O₃

Hydrogen 0.05 % H 0.42 % H₂O

Oxygen 25.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_1.1Sb_0.7Sn_0.1Ti_0.9Nb_0.7Ta_0.4O_6.8(OH)_0.2

Environment:

Replacement masses and in veinlets, in a granite pegmatite in a serpentinite.

IMA Status:

Approved IMA 1979

Locality:

Vezna, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for antimony (STIBium) in its composition and membership in the betafite subgroup of the pyrochlore group.

Search for Stibiobetafite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Stibiobetafite Crystallography

Cell Dimensions:

a = 10.356, Z = 8; V = 1,110.65 Den(Calc)= 5.19

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.989(1), 1.561(0.4), 1.83(0.4),

Physical Properties of Stibiobetafite

Cleavage:

None

Color:

Dark brown, Black brown.

Density:

5.3

Diaphaniety:

Translucent to Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

brownish white

Optical Properties of Stibiobetafite

Gladstone-Dale:

CI meas= 0.38 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.367 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1503,KPDmeas= 0.1472,KC= 0.2373

Optical Data:

Isotropic, n=1.78.

Calculated Properties of Stibiobetafite

Electron Density:

r_electron=4.70 gm/cc
note: r_{Stibiobetafite}=5.19 gm/cc.

Fermion Index

Fermion Index = 0.01767
Boson Index = 0.98233

Photoelectric:

PE_{Stibiobetafite}= 288.11 barns/electron
U=PE_{Stibiobetafite} x r_electron=1,355.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stibiobetafite is Not Radioactive

Stibiobetafite Classification

Dana Class:

8.2.3.4 (8)Multiple Oxides with Nb, Ta, and Ti

(8.2)where (A)2 (B2O6) (O,OH,F)

(8.2.3)Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)

8.2.3.1 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

8.2.3.2 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

8.2.3.3 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

8.2.3.4 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

8.2.3.5 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

Strunz Class:

IV/C.16-20 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.16 - Pyrochlore group, Betafite series with Ti > (Nb,Ta)

IV/C.16-10 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

IV/C.16-20 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

IV/C.16-30 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

IV/C.16-40 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

Other Stibiobetafite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Stibiobetafite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

Search for Stibiobetafite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Stibiobetafite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Stibiobetafite Mineral Data :

Ask about Stibiobetafite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Stibiobetafite Specimen Label here :

Stibiobetafite

(Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7
Dana No: 8.2.3.4 Strunz No: IV/C.16-20
Locality:

Notes: